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authorChanwoo Choi <cw00.choi@samsung.com>2013-02-13 03:50:00 +0400
committerChanwoo Choi <cw00.choi@samsung.com>2013-02-14 02:54:09 +0400
commit027fcd50500fd87847891d5c2f341c1f002de3e8 (patch)
tree32fd5d9c9ce5ccd99e3d43e524f8504af2dd6010 /drivers/extcon
parent07c70503a420d48402b3859e2c1c4c847a130a8b (diff)
downloadlinux-027fcd50500fd87847891d5c2f341c1f002de3e8.tar.xz
extcon: max8997: Set default of ADC debounce time during initialization
This patch set default of ADC Debounce Time(25ms) during probe step. Also, can possible change ADC Debounce Time according to H/W situation by using max8997_set_adc_debounce_time() Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-max8997.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 8739b50c2b36..3206daaf8e08 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -30,6 +30,13 @@
#define DEV_NAME "max8997-muic"
+enum max8997_muic_adc_debounce_time {
+ ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
+ ADC_DEBOUNCE_TIME_10MS, /* 10ms */
+ ADC_DEBOUNCE_TIME_25MS, /* 25ms */
+ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
+};
+
struct max8997_muic_irq {
unsigned int irq;
const char *name;
@@ -95,6 +102,38 @@ static const char *max8997_extcon_cable[] = {
};
/*
+ * max8997_muic_set_debounce_time - Set the debounce time of ADC
+ * @info: the instance including private data of max8997 MUIC
+ * @time: the debounce time of ADC
+ */
+static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
+ enum max8997_muic_adc_debounce_time time)
+{
+ int ret;
+
+ switch (time) {
+ case ADC_DEBOUNCE_TIME_0_5MS:
+ case ADC_DEBOUNCE_TIME_10MS:
+ case ADC_DEBOUNCE_TIME_25MS:
+ case ADC_DEBOUNCE_TIME_38_62MS:
+ ret = max8997_update_reg(info->muic,
+ MAX8997_MUIC_REG_CONTROL3,
+ time << CONTROL3_ADCDBSET_SHIFT,
+ CONTROL3_ADCDBSET_MASK);
+ if (ret) {
+ dev_err(info->dev, "failed to set ADC debounce time\n");
+ return -EAGAIN;
+ }
+ break;
+ default:
+ dev_err(info->dev, "invalid ADC debounce time\n");
+ return -EINVAL;
+ }
+
+ return 0;
+};
+
+/*
* max8997_muic_set_path - Set hardware line according to attached cable
* @info: the instance including private data of max8997 MUIC
* @value: the path according to attached cable
@@ -507,6 +546,9 @@ static int max8997_muic_probe(struct platform_device *pdev)
}
}
+ /* Set ADC debounce time */
+ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
+
/* Initial device detection */
max8997_muic_detect_dev(info);